run flat MERCEDES-BENZ SLC 2019 User Guide

pressure loss warning system" section(Ypage 274).
Important safety notes
The tire pressure warning system does notwarn you of an incorrectly set tire pressure.Observe the notes on the recommended tirepressure (Ypage 270).
The tire pressure loss warning does notreplace the need to regularly check the tirepressure. An even loss of pressure on severaltires at the same time cannot be detected bythe tire pressure loss warning system.
The tire pressure monitor is not able to warnyou of a sudden loss of pressure, e.g. if thetire is penetrated by a foreign object. In theevent of a sudden loss of pressure, bring thevehicle to a halt by braking carefully. Avoidabrupt steering movements.
The function of the tire pressure loss warningsystem is limited or delayed if:
Rsnow chains are mounted on your vehicle'stires.
Rroad conditions are wintry.
Ryou are driving on sand or gravel.
Ryou adopt a very sporty driving style (corner-ing at high speeds or driving with high ratesof acceleration).
Ryou drive with a heavy load.
Restarting the tire pressure loss warn-
ing system
Restart the tire pressure loss warning systemif you have:
Rchanged the tire pressure
Rchanged the wheels or tires
Rmounted new wheels or tires
XBefore restarting, make sure that the tirepressures are set properly on all four tiresfor the respective operating conditions.
The recommended tire pressure can befound on the Tire and Loading Informationplacard on the B-pillar. Additionally, a tirepressure table is attached to the fuel fillerflap. The tire pressure loss warning systemcan only give reliable warnings if you haveset the correct tire pressure. If an incorrect
tire pressure is set, these incorrect valueswill be monitored.
XAlso observe the notes in the section on tirepressures (Ypage 270).
XMake sure that the SmartKey is in positionHin the ignition lock (Ypage 118).
XPress theYorebutton on the steer-ing wheel to select theServ.Serv.menu.
XPress thecordbutton to selectTire PressureTire Pressure.
XPress thevbutton.TheRun Flat Indicator Active PressRun Flat Indicator Active Press'OK' to Restart'OK' to Restartmessage appears in themultifunction display.
If you wish to confirm the restart:
XPress thevbutton.TheTire Pressure Now OK?Tire Pressure Now OK?messageappears in the multifunction display.
XPress thecordbutton to selectYesYes.
XPress thevbutton.TheRun Flat Indicator RestartedRun Flat Indicator Restartedmes-sage appears in the multifunction display.
After a teach-in period, the tire pressureloss warning system will monitor the set tirepressures of all four tires.
If you wish to cancel the restart:
XPress the8button.
or
XIf theTire Pressure Now OK?Tire Pressure Now OK?messageappears, use thecordbutton toselectCancelCancel.
XPress thevbutton.The tire pressure values stored at the lastrestart will continue to be monitored.
Tire pressure monitor
General notes
If a tire pressure monitor is installed, the vehi-cle's wheels have sensors that monitor the tirepressures in all four tires. The tire pressuremonitor warns you if the pressure drops in oneor more of the tires. The tire pressure monitoronly functions if the corresponding sensorsare installed in all wheels.
Information on tire pressures is displayed inthe multifunction display. After a few minutesof driving, the current tire pressure of each tire
274Tire pressure
Wheels and tires

Raising the vehicle
GWARNING
If you do not position the jack correctly at
the appropriate jacking point of the vehicle,
the jack could tip over with the vehicle
raised. There is a risk of injury.
Only position the jack at the appropriate
jacking point of the vehicle. The base of the
jack must be positioned vertically, directly
under the jacking point of the vehicle.
!Only position the jack at the appropriatejacking point of the vehicle. Otherwise, youcould damage the vehicle.
Observe the following when raising the vehi-cle:
RTo raise the vehicle, only use the vehicle-specific jack that has been tested andapproved by Mercedes-Benz. If used incor-rectly, the jack could tip over with the vehi-cle raised.
RThe jack is designed only to raise and holdthe vehicle for a short time while a wheelis being changed. It must not be used forperforming maintenance work under thevehicle.
RAvoid changing the wheel on uphill anddownhill slopes.
RBefore raising the vehicle, secure it fromrolling away by applying the parking brakeand inserting wheel chocks. Do not disen-gage the parking brake while the vehicle israised.
RThe jack must be placed on a firm, flat andnon-slip surface. On a loose surface, a large,flat, load-bearing underlay must be used. Ona slippery surface, a non-slip underlay mustbe used, e.g. rubber mats.
RDo not use wooden blocks or similar objectsas a jack underlay. Otherwise, the jack willnot be able to achieve its load-bearing capa-city due to the restricted height.
RMake sure that the distance between theunderside of the tires and the ground doesnot exceed 1.2 in (3 cm).
RNever place your hands and feet under theraised vehicle.
RDo not lie under the vehicle.
RDo not start the engine when the vehicle israised.
RDo not open or close a door or the trunk lidwhen the vehicle is raised.
RMake sure that no persons are present inthe vehicle when the vehicle is raised.
XUsing lug wrenchC, loosen the bolts onthe wheel you wish to change by about onefull turn. Do not unscrew the bolts com-pletely.
The jacking points are located just behind thefront wheel housings and just in front of therear wheel housings (arrows).
Vehicles with AMG equipment:the vehiclehas covers installed to protect the vehiclebody next to the jacking points on the outersills.
290Changing a wheel
Wheels and tires

These tires have been specially adapted foruse with the control systems, such as ABS
or ESP®, and are marked as follows:
RMO = Mercedes-Benz Original
RMOE = Mercedes-Benz Original Extended(tires featuring run-flat characteristics)
RMO1 = Mercedes-Benz Original (only cer-tain AMG tires)
Mercedes-Benz Original Extended tires mayonly be used on wheels that have been spe-cifically approved by Mercedes-Benz.
Only use tires, wheels or accessories testedand approved by Mercedes-Benz. Certaincharacteristics, e.g. handling, vehicle noiseemissions or fuel consumption, may other-wise be adversely affected. In addition,when driving with a load, tire dimension var-iations could cause the tires to come intocontact with the bodywork and axle compo-nents. This could result in damage to thetires or the vehicle.
Mercedes-Benz accepts no liability for dam-age resulting from the use of tires, wheelsor accessories other than those tested andapproved.
Information on tires, wheels and approvedcombinations can be obtained from anyqualified specialist workshop.
!Retreaded tires are neither tested nor rec-ommended by Mercedes-Benz, since previ-ous damage cannot always be detected onretreaded tires. As a result, Mercedes-Benzcannot guarantee vehicle safety if retreadedtires are mounted. Do not mount used tiresif you have no information about their previ-ous usage.
The recommended pressures for various oper-ating conditions can be found:
Ron the Tire and Loading Information placardon the B-pillar on the driver's side
Rin the tire pressure table on the fuel fillerflap
Observe the notes on recommended tire pres-sures under various operating conditions(Ypage 270).
Check tire pressures regularly, and only whenthe tires are cold. Comply with the mainte-nance recommendations of the tire manufac-turer in the vehicle document wallet.
Notes on the vehicle equipment – alwaysequip the vehicle:
Rwith tires of the same size on a given axle(left and right)
Rwith the same type of tires at a given time(summer tires, winter tires, MOExtendedtires)
Exception: it is permissible to mount a dif-ferent type or make in the event of a flattire. Observe the "MOExtended tires (tireswith run-flat characteristics)" section(Ypage 253).
Vehicles equipped with MOExtended tires arenot equipped with a TIREFIT kit at the factory.It is therefore recommended that you addition-ally equip your vehicle with a TIREFIT kit if youmount tires that do not feature run-flat charac-teristics, e.g. winter tires. A TIREFIT kit may beobtained from a qualified specialist workshop.
Emergency spare wheel
Important safety notes
GWARNING
The wheel or tire size as well as the tire type
of the spare wheel or emergency spare
wheel and the wheel to be replaced may dif-
fer. Mounting an emergency spare wheel
may severely impair the driving characteris-
tics. There is a risk of an accident.
To avoid hazardous situations:
Radapt your driving style accordingly and
drive carefully.
Rnever mount more than one spare wheel
or emergency spare wheel that differs in
size.
Ronly use a spare wheel or emergency
spare wheel of a different size briefly.
Rdo not switch ESP®off.
Rhave a spare wheel or emergency spare
wheel of a different size replaced at the
nearest qualified specialist workshop.
Observe that the wheel and tire dimen-
sions as well as the tire type must be cor-
rect.
Emergency spare wheel293
Wheels and tires
Z

When using an emergency spare wheel orspare wheel of a different size, you must notexceed the maximum speed of 50 mph(80 km/h).
Snow chains must not be mounted on emer-gency spare wheels.
General notes
You can ask for information regarding permit-ted emergency spare wheels at an authorizedMercedes-Benz Center.
You should regularly check the pressure of theemergency spare wheel, particularly prior tolong trips, and correct the pressure as neces-sary (Ypage 270). The value on the wheel isvalid.
An emergency spare wheel may also be moun-ted against the direction of rotation. Observethe time restriction on use as well as thespeed limitation specified on the emergencyspare wheel.
Replace the tires after six years at the latest,regardless of wear. This also applies to theemergency spare wheel.
When you are driving with the collapsiblespare wheel mounted, the tire pressure losswarning system or the tire pressure monitorcannot function reliably. Only restart the tirepressure loss warning system or tire pressuremonitor when the defective wheel has beenreplaced with a new wheel.
Vehicles with tire pressure monitor:aftermounting an emergency spare wheel, the sys-tem may still display the tire pressure of theremoved wheel for a few minutes. The valuedisplayed for the mounted emergency sparewheel is not the same as the current tire pres-sure of the emergency spare wheel.
Removing the emergency spare
wheel
Vehicles with a collapsible spare
wheel
The collapsible spare wheel can be found inthe stowage well under the trunk floor(Ypage 227).
XTurn retaining screwDcounter-clockwiseand remove it.
XRemove collapsible spare wheelC.
Always observe the instructions and safetynotes in the "Mounting a wheel" section(Ypage 289).
Stowing the emergency spare wheel
!Only place the collapsible spare wheel inthe vehicle when it is dry. Otherwise, mois-ture may get into the vehicle.
Take the following steps to stow a used col-lapsible spare wheel. Otherwise, the collapsi-ble spare wheel will not fit in the trunk in theintended manner. Mercedes-Benz recom-mends that you have this work carried out at aqualified specialist workshop.
XUnscrew the valve cap from the valve.
XIf possible, unscrew the valve insert fromthe valve and release the air.Fully deflating the tires can take a fewminutes.
XScrew the valve insert back into the valve.
XScrew the valve cap back on.
XPull the protective sheet provided with thespare wheel over the collapsible sparewheel.
XStow the collapsible spare wheel in theemergency spare wheel well under thetrunk.
XUse the retaining screw to pierce the pro-tective sheet and fasten the collapsiblespare wheel in place.
294Emergency spare wheel
Wheels and tires

Inflating the collapsible spare wheel
!Inflate the collapsible spare wheel usingthe tire inflation compressor before loweringthe vehicle. The wheel rim could otherwisebe damaged.
!Do not operate the tire inflation compres-sor for longer than eight minutes at a timewithout a break. It may otherwise overheat.
The tire inflation compressor can be oper-ated again once it has cooled down.
XMount the collapsible spare wheel as descri-bed (Ypage 289).
The collapsible spare wheel must be moun-ted before it is inflated.
XRemove the tire inflation compressor fromthe stowage space under the trunk floor(Ypage 252).
XPull plug